Plug in the other end of the ethernet cable to the A input of the receiver card.
Lastly, plug in the three runs of LED power cables.

We suggest cutting out the yellow wires so you don't accidentally connect to the 12V lines.
Before turning the power supply on, make sure all power is wired correctly. Seriously! This is 30A of 5V power, so you really really want to make sure its wired correctly.
You may want to connect only one panel row or column at a time to power/data. simply unscrew the power connectors from the first panel to the second, and unplug the data connection cable from first panel to second, etc. This way you can test the setup with a single panel. Once you verify nothing is smoking and there's some video out, you can power down the ATX supply and connect another panel/row/column etc.

Don't do your testing in a rush! Be careful and methodical!

Once everything is powered on, your computer should detect an external display. Adafruit receiver/senders are pre-programmed so you should see some video depending on your monitor configuration. If you can 'mirror' your display that is easiest to debug.

If you have a different setup than this tutorial, don't worry if the LED wall is acting funny or not on at all. This will be fixed in the next step. As long as the green lights are flashing on both the sender and receiver cards then that means that data is being transmitted.

This guide was first published on Jul 18, 2013. It was last updated on Jul 18, 2013.

This page (Final Connections) was last updated on Jan 25, 2022.

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